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Patented July 12, 1 881.

MACHINE FOR MAKING HORSESHOE NAILS.

(No Model.)

fiineoaea i UNITED STATES PATENT OFFICE.

JOHN A. COLEMAN, OF PROVIDENCE, ItHODE ISLAND.

MACHINE FOR MAKING HORSESHOE-NAILS.

SPECIFICATION forming part of Letters Patent No. 244,188, dated July 12, 1881.

Application filed April 14, 1881.

To all whom it may concern Be it known that I, JOHN ADDISON COLE- MAN, a citizen of the United States, residing at Providence, county of Providence and State of Rhode Island, have invented a new and useful Improved Machine for the Manufacture of Nails forFastenin g Horseshoes and other Purposes, (for which I have obtained a patent in Great Britain, N 0. 5,151, hearing date December 9, 1880,) of which the following is a specification. 7

It has been proposed to manufacture nails such as are employed for fastening horseshoes by machinery operating in the following man ner: A bar of iron rolled with a thickened rib along each edge is fed, step by step, under a pair of punches, which by their descent punch transversely therefrom two blanks or pieces of the metal, intended each to form a nail, the thickened end in each case being suited to form the head of the nail. As these pieces are severed they lie to opposite hands in the die, and in that position they are received by -spring-fingers,which, by a sweeping movement,

take them out of the die and carry them round, one toward the right and one toward the left, and insert them between two rollers. 'In passing through between those rollers the blanks are drawn out in length and squeezed partly toward the finished shape. Leaving the rollers, the blanks are again seized by fingers and transferred to another pair of rollers, by which they are further drawn and pointed to the required shape. From the second pair of rollers the nails are transferred to a pair of finishingpunches, which strip off the thin fins and such other protuberances as may be caused by the squeezing action of the rolls, delivering the nails in finished condition.

My invention consists in improvements in the general arrangement and construction of apparatus of this kind, whereby the structure and action of the parts are rendered more simple, and the machine, besides being less expensive in first cost, is thus rendered more durable and capable of producing an increased quantity of the articles which it manufactures.

The accompanying drawings represent my improved machine.

Figure 1 is a front view, Fig. 2 a side View, and Fig. 3 a vertical section, of the machine- (No model.) Patented in England December 9, 1880.

The other figures show separately parts thereof drawn to an enlarged scale-that is to say, Fig. 4is a front view, Fig. 5 a side view, and Fig. 6 a plan, of the apparatus for transferring the punched blanks from the die to'the first pair of squeezing-rollers. Fig. 7 is a front view, showing the mode of holding the blank as it issues from the first pair of rolls so as to transfer it to the second pair of rolls, Fig. 8 being an enlarged side view, and Fig. 9 an en larged plan, of the spring-holders employed for this purpose. Figs. 10 and 11 are respectively front and side views, showing the mode of holding the nails ready for the action of the finishing-dies.

In all these figures corresponding parts are marked by similar reference-letters.

A is the framing of the machine, which at its upper part has bearings for the main shaft A, by the continued revolution of which all the movements of the various parts are effected. This shaft may conveniently be driven, as shown, by bevel-gearin g A A from a more rapidly revolving shaft, A, which may be driven from any suitable motor. In the middle of the shaft A is fixed an eccentric, A which in every revolution of the shaft gives an up-and-down motion to a pair of punches, I). These punches are so shaped as to punch at each stroke a pair of blanks having approximately the shape of the nails from a bar, B. This bar, as is more clearly seen in Fig. 4, is rolled of a section having the metal thickened toward each edge, and the two punches I) being set, the one with the broad part of its face toward the right and the other with the broad part of its face toward the left, each punches out a blank having one of its ends wider and thicker than the other to form the nail-head, the two blanks thus punched being forced through the die I) with their heads presented toward the right and left, respectively. At each upstroke of the punches b the bar B is fed forward a suitable distance to present fresh metal for the next punching. This feed-motion is effected in the following manner: A barrel-cam, A, on the shaft A gives a reciprocating movement to a bent lever, B, and through it to a sliding carriage, B In this carriage isa hinged flap, b which is alternately pressed firmly down on the bar B and relieved therefrom. This movex i MI I ment is effected by a face-cam, A on the shaft A, which, engaging a stud on a vertical slidebar, to, causes it to reciprocate, and this movement, communicated bya connecting-rod, a, to a lever, a mounted on the carriage B brings a cam-face, a, on that lever alternately to bear on the flap b and to relieve it. The cams A and A are so timed to one another and to the eccentric A that while the punches I), worked by A are performing the upper part of their movement clear of the bar B the flap b is pressed firmly on the bar B and the carriage B is advanced the proper feeding distance. While the punches b descend the carriage B holding the bar B, remains stationary, and while the punches b are penetrating and holding the bar B the flap b is released and the 1 carriage B moves back without tending to; drag back the barB. The two blanks punched I from the bar 13 are pressed through the die I),

each in a horizontal attitude, being received 1 between the spring-jaws of a holder, 0, for the 1 one blank and c for the other blank. These two holders 0 and c are respectively fixed on spindles O and 0 which are geared together by toothed wheels 0 and c at their ends, so that the two spindles make a partial revolution in opposite directions, the one of them, 0, being worked by a crank which engages in a cam-slot in a reciprocating plate, 0 This plate, which is mounted on apivot, 0 is worked by a rod, 0 from a'lever, O ,'which is pivoted at C and has a forked end embracing an eccentric, A*, on the shaft A. The spindles O and O are mounted on a frame, 0, which is 5 pivoted at c to the framing of the machine, and f is drawn up by a spring, 0.

The cam-slot in O is so shaped as to give to the holders 0 0 the following series of movements: First, having remained in their upper position for a time stationary, to receive their f respective blanks pushed into them by the descent of the punches b, they are caused by the partial movement of the lever O to turn 'throu gh 1 an angle of ninety degrees, each therefore turnments of the holders. its back-stroke the frame 0 is raised by the As the lever 0 makes 4 spring 0" and the spindles O (J are turned backward through ninety degrees, so that the holders 0 c resume their first position, ready to receive another pair of blanks from the die I). f

The two pairs of rollers-D D the upper pair, and D D*, the lower pair-receive reciprocating rotary motion through a part of a revolu- 1 tion, each pair in opposite directions, by toothed wheels D and D which gear with one another, while D gears with a pinion on the axis of the roller D, and D gears with a pinion on the axis of D the pinion on D gearing with a pinion on D, and the pinion on D gearing with a pinion on D The first wheel, D has on its axis a crank-arm, D", which is linked by a rod, D, to a crank-pin, A projecting from the wheel A so that for each revolution of the shaft Athe rollers are caused to perform their complete reciprocation. The rollers have portion-s of their peripheries hollowed out, as indicated by the dotted lines at d in Fig. 4 and by the darkened parts d d d d in Fig.3, these hollows being so shaped that the blanks delivered from the holders 0' 0 in between the rollers D D are, by the movement of these rollers, to a certain extent squeezed into shape and extended in length, and that the blanks, delivered thus partly shaped from the rollers D D are further shaped to their final form by the hollows of the second pair of rollers, D D, between which they are caused to pass. The rollers D D are so set on their axes, and their movement is so timed to that of the holders '0 0 that they present their hollows d d upward when the holders 0 c descend, inserting the blanks between the rollers, and this descending movement of the holders is made to correspond as nearly as possible with the surface movement of the rollers D D as they begin to gripe the blanks, until the rollers, having got a firm gripe, drag the blanks outof the holders and pass them through to other holders ready to receive them 'below the rollers D D in order to transfer them to the lowerrollers, D D The holders cfor this purpose (shown to an enlarged scale in Figs. 8 and 9 and appearing, partly in section, as they hold the blank in Fig. 7) present trumpet-mouthed slots having one side covered by a movable piece, 0, which is held up by a spring, a. Theu-pper rollers, D D ,-in delivering the two blanks from between them through a fixed guide, d thrust theblanks, head downward, one into each of the slots in e, the cover-piece e yielding to let the heads of the blanks pass, and then being returned bythe spring 6 so as to gripe firmlythe shanks of the blanks, the heads of the latter projecting below, as indicated in Fig. 7. The blanks thus held in the slots of e are, by the descent of e, conveyed to the lower roll-s, D D, and have their heads thrust into the hollows of these rolls, which are at that time direct-ed upward to receive them. The rolls D Dflhaving griped the blanks, drag them out of the holder 0, which reascends to receive a succeeding pair. As the blanks leave the rolls D D they are in a similar manner received by an other holder like a, and are by it conveyed down to gripers hereinafter to be described, by which they are presented to the finishingpunches.

The two holders--namely, e--above the rolls D D and the corresponding holder below these rolls are respectively at the ends of arms a and c projecting from vertical rods 0 and e. These rods are caused to reciprocate in a guide, .E,respectively, by studs on them engagingin the cam-slots of two vibrating plates, E and IIS E worked by crank-arms E and E and connecting-rods E and E from two eccentrics, A and A fixed side by side on the shaft A. The cam-slots in E and E and the eccentrics which work these are so shaped and timed as to give the respective holders the required movements-that is to say, each remains for a time stationary in its highest position while it receives the blanks passed into its slots from the rolls above it. Then each descends to deliver the blanks, the one to the rolls D l) and the other to the gripers, which will now be described.

A lever, F, pivoted at f, has the end of its short arm rounded and toothed to gear with a short lever which is pivoted at f On each of the levers is a pair of fingers, having their upper ends shaped to receive and hold the heads of the nails. One of the fingers is in each case fixed on its lever, the other being pivoted loosely thereon, and the fixed finger of each is linked to the movable finger of the other, so that as the lever F is caused to reciprocate the fingers of each pair are made to open apart to receive a nail and to close together and gripe it. The leverF is worked by alink, F, from a sliding rod, F, which is drawn up by a spring, F. A projection, F on the rod F is struck by a spring pawl hinged at the end of an arm, E projecting from the axis of E so that when the holder worked by E descends with the nails received from the lowest pair of rolls the gripers connected to F are opened for a moment to receive the nail-heads, and when the arm E" passes F the gripers are closed by the spring F so as to gripe tightly the nails g 9 which have been introduced between then. On the reascent of the arm E the spring-pawl at its end yields in passing the projection F The nails g g are held by the gripers exactly in front of a die, G, having two holes through it, each exactly the shape of afinished nail, each hole receiving a punch, h, of the same shape. The punches h are fixed to the face of a horizontal slide, H, which is connected by a link, H, to one arm, H of abell-crank lever, the other arm of which is connected by a rod, E to an eccentric, A on the shaft A. By means of the punches h, which at their forward stroke push the nails g 9 out of the gripers and through the die G, is performed the final operation of cutting ofl from the nails such fins, burrs, or projections of the metal as may have been produced by the squeezing of the rolls, and the finished nails drop through a passage, G, behind the die G, the burrs sliced oif by the punches and dies falling through an opening, G in front of the die.

Although I have thus described an entire machine for manufacturing horseshoe or other nails by punching blanks from a bar of metal,

squeezing these blanks by rolls, and finishing them by final punching, I would have it understood that I make no general claim to this system of manufacturing nails, nor to the described sequence of operations for that purpose, as a machine embodying these has been previously described in the patent-specification of L. W. Whipple, No. 228,792, dated 15th of June, 1880; nor do I claim such of the mechanical details as are similar to those described in the said specification; but Ionly claim improvements in the construction and arrangement of a machine operating in this manner, as follows:

1 claim- 1. The herein-described machine with the framing A, having in its upper part bearings for the main shaft A, from which single shaft, by means of cranks, eccentrics, and cams, the required movements are given to the feeding apparatus 13 and D to the punches b, to the blank-holders 0 0 to the rolls D D D D, to the two sets of holders e, the gripers of the nails g 9 and to the finishing-punches h, all of said parts being combined, organized, and arranged to operate as shown and described.

2. The combination of the cams A and A", the lever B and slide E the rods a a, lever a and its cam-face a constituting the feed apparatus, substantially as herein described.

3. The combination of the eccentric A forklever O and rod 0 cam slotted plate 0 spring-frame O, and holders 0 c, for transferring the punched blanks from the die to the upper rolls, substantially as herein described. 7

4.. The combination of the eccentrics A and A their rods and E, the arms E E the cam-slotted plates E and E and the slide-rods e and 6 with spring-holders e, for transferring the blanks from the first pair of rolls to the second pair and from the second pair to the gripers, substantially as herein described.

5. The combination of the arm E and its spring-pawl with the spring-slide F and rod F, the lever F, and the gripers for holding the nails g g at the finishing-dies, substantially as herein described.

6. The method, substantially as herein described, of transferrin g a pair ofpunched blanks handed from a die to squeezing-rolls by causing them to turn through an arc of ninety degrees in opposite directions and then to advance to the gap of the rolls.

In testimony whereof I have signedmy name to this specification, in the presence of two subscribing witnesses, this 30th day of March, A. D. 1881.

J. A. COLEMAN.

Vitnesses:

OLIVER IMRAY, J NO. P. M. MILLARD. 

